Sonar unit for fishermen



FIG. 1 is a top plan view of a sonar unit for fishermen showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side elevational view thereof, the left side being a mirror image thereto;

FIG. 5 is a rear elevational view thereof. 

The ornamental design for a sonar unit for fishermen, substantially as shown and described. 